PLSS Map

source: http://images.search.yahoo.com/images/view?back=http%3A%2F%2Fimages.search.yahoo.com%2Fsearch%2Fimages%3Fei%3DUTF-8%26p%3DPLSS%2520map%2520%26fr2%3Dtab-web%26fr%3Dyfp-t-501&w=500&h=346&imgurl=upload.wikimedia.org%2Fwikipedia%2Fcommons%2Fthumb%2F8%2F83%2FMeridians-baselines.png%2F500px-Meridians-baselines.png&rurl=http%3A%2F%2Fen.wikipedia.org%2Fwiki%2FPublic_Land_Survey_System&size=307kB&name=500px-Meridians-baselines.png&p=PLSS+map&type=png&oid=854fbd6155612910&no=4&tt=105&sigr=11mofvkkv&sigi=137tp3b3g&sigb=12uelp45m

This map is a Public Land Survey System map; it is used in the United States to survey and identify land parcels. This map depicts the principle merideans and baselines used for surveying states.